tests/spec/intel_conservative_rasterization/innercoverage.c

   1 /*
   2  * Copyright © 2016 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24
  25 /** @file innercoverage.c
  26  *
  27  * Verifies that the inner_coverage layout qualifier works when
  28  * GL_INTEL_conservative_rasterization is enabled.
  29  */
  30
  31 #include "piglit-util-gl.h"
  32 #include "piglit-matrix.h"
  33
  34 PIGLIT_GL_TEST_CONFIG_BEGIN
  35
  36 #if defined(PIGLIT_USE_OPENGL)
  37         config.supports_gl_core_version = 42;
  38 #elif defined(PIGLIT_USE_OPENGL_ES3)
  39         config.supports_gl_es_version = 31;
  40 #endif
  41
  42         config.window_width = 400;
  43         config.window_height = 400;
  44         config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE;
  45
  46 PIGLIT_GL_TEST_CONFIG_END
  47
  48 enum piglit_result
  49 piglit_display(void)
  50 {
  51         enum piglit_result result = PIGLIT_PASS;
  52
  53         /* The following fragment programs render the opaque red color
  54          * only when dispatched with a gl_SampleMaskIn empty. It
  55          * should therefore expose the effect of the inner_coverage
  56          * (i.e. no color with this qualifier and a triangle outline
  57          * without it). */
  58         GLuint inner_prog = piglit_build_simple_program(
  59 #if defined(PIGLIT_USE_OPENGL)
  60                 "#version 420\n"
  61 #elif defined(PIGLIT_USE_OPENGL_ES3)
  62                 "#version 310 es\n"
  63 #endif
  64                 "in vec4 piglit_vertex;\n"
  65                 "void main()\n"
  66                 "{\n"
  67                 "  gl_Position = piglit_vertex;\n"
  68                 "}\n",
  69 #if defined(PIGLIT_USE_OPENGL)
  70                 "#version 420\n"
  71                 "#extension GL_INTEL_conservative_rasterization: enable\n"
  72 #elif defined(PIGLIT_USE_OPENGL_ES3)
  73                 "#version 310 es\n"
  74                 "#extension GL_OES_sample_variables: enable\n"
  75                 "#extension GL_INTEL_conservative_rasterization: enable\n"
  76                 "precision highp float;\n"
  77 #endif
  78                 "layout(inner_coverage) in;\n"
  79                 "out vec4 color;\n"
  80                 "void main()\n"
  81                 "{\n"
  82                 "  float one = 1.0 - float(gl_SampleMaskIn[0]);\n"
  83                 "  color = vec4(one, 0.0, 0.0, one);\n"
  84                 "}\n");
  85         if (!inner_prog)
  86                 piglit_report_result(PIGLIT_FAIL);
  87
  88         GLuint conservative_prog = piglit_build_simple_program(
  89 #if defined(PIGLIT_USE_OPENGL)
  90                 "#version 420\n"
  91 #elif defined(PIGLIT_USE_OPENGL_ES3)
  92                 "#version 310 es\n"
  93 #endif
  94                 "in vec4 piglit_vertex;\n"
  95                 "void main()\n"
  96                 "{\n"
  97                 "  gl_Position = piglit_vertex;\n"
  98                 "}\n",
  99 #if defined(PIGLIT_USE_OPENGL)
 100                 "#version 420\n"
 101                 "#extension GL_INTEL_conservative_rasterization: enable\n"
 102 #elif defined(PIGLIT_USE_OPENGL_ES3)
 103                 "#version 310 es\n"
 104                 "#extension GL_OES_sample_variables: enable\n"
 105                 "#extension GL_INTEL_conservative_rasterization: enable\n"
 106                 "precision highp float;\n"
 107 #endif
 108                 "out vec4 color;\n"
 109                 "void main()\n"
 110                 "{\n"
 111                 "  float one = 1.0 - float(gl_SampleMaskIn[0]);\n"
 112                 "  color = vec4(one, 0.0, 0.0, one);\n"
 113                 "}\n");
 114         if (!conservative_prog)
 115                 piglit_report_result(PIGLIT_FAIL);
 116
 117         glBindFramebuffer(GL_DRAW_FRAMEBUFFER, piglit_winsys_fbo);
 118         glViewport(0, 0, piglit_width, piglit_height);
 119
 120         glClearColor(0.0, 0.0, 0.0, 0.0);
 121
 122         GLuint vao;
 123         glGenVertexArrays(1, &vao);
 124         glBindVertexArray(vao);
 125
 126         GLuint vbo;
 127         float delta = 1.01 / piglit_width;
 128         float vertices[3][2] = {
 129                 { -0.5, -1 + delta, },
 130                 { 0, 0.8, },
 131                 { 0.5, -1 + delta, },
 132         };
 133         glGenBuffers(1, &vbo);
 134         glBindBuffer(GL_ARRAY_BUFFER, vbo);
 135         glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
 136         glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 2 * sizeof(GLfloat), NULL);
 137         glEnableVertexAttribArray(0);
 138
 139         glEnable(GL_CONSERVATIVE_RASTERIZATION_INTEL);
 140
 141         glUseProgram(conservative_prog);
 142         glClear(GL_COLOR_BUFFER_BIT);
 143         glDrawArrays(GL_TRIANGLES, 0, 3);
 144
 145         if(!piglit_check_gl_error(GL_NO_ERROR))
 146                 return PIGLIT_FAIL;
 147
 148         piglit_present_results();
 149
 150         const float conservative_expected[] = { 0.0, 0.0, 0.0, 0.0 };
 151         if (!piglit_probe_pixel_rgba(piglit_width / 2, 0, conservative_expected))
 152                 result = PIGLIT_FAIL;
 153
 154         glUseProgram(inner_prog);
 155         glClear(GL_COLOR_BUFFER_BIT);
 156         glDrawArrays(GL_TRIANGLES, 0, 3);
 157
 158         if(!piglit_check_gl_error(GL_NO_ERROR))
 159                 result = PIGLIT_FAIL;
 160
 161         piglit_present_results();
 162
 163         const float inner_expected[] = { 1.0, 0.0, 0.0, 1.0 };
 164         if (!piglit_probe_pixel_rgba(piglit_width / 2, 0, inner_expected))
 165                 result = PIGLIT_FAIL;
 166
 167         return result;
 168 }
 169
 170 void piglit_init(int argc, char **argv)
 171 {
 172         piglit_require_extension("GL_INTEL_conservative_rasterization");
 173 }